Unbreakable glass is glass, or glass substitute, which does not display the normal fragility of glass – in general the term is not used to refer to something that is absolutely unbreakable. == In historical fiction == In Satyricon, a work of satirical fiction by Petronius (c. 27 AD – c. 66 AD), an inventor brought a drinking bowl to the Roman emperor Tiberius made of vitrum flexile – translated as either flexible or unbreakable glass – which did not shatter but merely dented.
Unbreakable glass is glass, or glass substitute, which does not display the normal fragility of glass – in general the term is not used to refer to something that is absolutely unbreakable. == In historical fiction == In Satyricon, a work of satirical fiction by Petronius (c. 27 AD – c. 66 AD), an inventor brought a drinking bowl to the Roman emperor Tiberius made of vitrum flexile – translated as either flexible or unbreakable glass – which did not shatter but merely dented.
Source: Wikipedia "Unbreakable glass" · CC BY-SA 4.0
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